Apparatus for boiling water.



No. 724,049. PATENTBD MAR. s1, 1903.

l R. c. sAYER. APPARALUS PoR BOILING WATER.

- APPLIATION FILED SEPT. 21, 1900. N0 MODEL. 2 SHEETS-SHEET l.

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PATBNTED MAB.. 31', 190s.

R. 0. SAYER. APPARATUS POR BOILING WATER.

APPLICATION FILED SEPT. 21, 1900.

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structed according to this invention.

UNITED STATES PATENT OFFICE.

ROBERT'OOOIIE sAYER, BRISTOL, ENGLAND.V

APPARATUS FOR BOILING WATER.

SPECIFICATION forming part of l Letters Patent N o. 724,049, dated March 31, 1903.

Application filed September 2l., 1900. Serial No. 30,698. (No modell) Y To all wir/0771, it may concern:

Be it known that I, ROBERT COOKE SAYER, engineer, a subject of the Queen of Great Britain and Ireland, residing at Bristol, Euglan'd, have invented certain newand useful Improvements in Apparatus for Boiling and Evaporating Water, (for which I have made application for patent in Great Britain, No. 14,592, dated the 15th of August, 1900;) and I do hereby declare the following to be a full, clear, and exact description of the invention,- such as will enable others skilled in the art to which it appertains'to make and use the same.

The object of this invention is to evaporate Water to give high pressure; and it essentially consists of a number of concentric tubes and formed With Webs that separate and mutually strengthen the tubes, the spaces so formed being arranged alternately to carry water and hot air. The concentric tubes are suspended Within a furnace more or less lined With tubes for heating the feed-Water. The furnace is provided with a door through which to draw out the boiler and others for stoking.

In the accompanying sheets of illustrative drawings, Figure 1 is a sectional elevation of the boiler without its inclosing walls con- Fig. 2 is a section at a a on Fig. 1, and Fig. 3 a detail of the tube connections. Fig. 4 is a sectional elevation of the boiler in the furnace. Fig. 5 is a sectional elevation at b b in Fig. 4, and Fig. 6 is a sectional plan at c c in Fig. 5.

The tubes 1 and 2 are connected with or carry webs 3, have coned or other suitable ends 4, and are connected to angle-joints 5 by the outer tubes 2 being screwed up, and so form tight spaces for water and hot air alternately. Circuits 6 7 8 9v 6 ofthe spaces are formed, and the nuts and caps 11 close the Water-spaces and 12 close the hot-air spaces. The whole is suspended over a source of heat at 10, and both are inclosed within Walls 17,

Figs. 4 to 6, having proper doors 18, through Whichto stoke and draw out the boiler, and the Walls are in part lined with Water-tubes 20and 2l, able to carry the feed-Water from its reservoir 22 and back again. The heat envelops all .the pipes and is directed to enter openings 13, pass through its spaces, and exit at 14, heating -the Water that enters at l5,

the steampressure between the concentric tubes.

2. A tubular boiler for heating water and evaporatingit, consisting of'a number of con# centric tubes forming alternate heating and heated spaces and having separating-Webs to `increase theirrstrength, angle-joints for connecting lengths of such tubes to form continuations of such spaces, a means for securing them together and closing the heated or heating spaces, entrancesy and exits` to the heating-spaces, entrance for the Water-supply and exit for the generated steam. I

3. A tubular boiler, consisting of concentric 'tubes and joints strengthened with Webs and connected together to form circuits, an inclosing furnace in which the tubes are suspended over a source of heat, feed-water tubes lining the walls inside to heat the feed-water and doors in the Walls.

In testimony whereof Ihave affixed my sig* 

